EP 0911257 A3 20000223 - Helicopter blade aerofoil
Title (en)
Helicopter blade aerofoil
Title (de)
Hubschrauber-Rotorblattprofil
Title (fr)
Profil de pale d'hélicoptère
Publication
Application
Priority
JP 29130097 A 19971023
Abstract (en)
[origin: EP0911257A2] Upper and lower surfaces of an aerofoil are defined by the following coordinates given in the table below, and the configuration of a leading edge of the aerofoil is defined by the following leading edge radius and the center of circle. Thus drag divergence Mach number Mdd and maximum lift coefficient Clmax can be increased and the noise level can be reduced. <TABLE> Leading edge radius r/C =0.01073 Center of circle X/C=0.01072, Y/C=-0.00373
IPC 1-7
IPC 8 full level
B64C 27/46 (2006.01); B64C 27/467 (2006.01)
CPC (source: EP US)
B64C 27/467 (2013.01 - EP US); Y10S 416/02 (2013.01 - EP US)
Citation (search report)
- [A] US 4325675 A 19820420 - GALLOT JACQUES, et al
- [A] EP 0262071 A1 19880330 - UNITED TECHNOLOGIES CORP [US] & JP H06364894 A
- [AD] JP S59134096 A 19840801 - BOEICHO GIJUTSU KENKYU HONBUCH, et al
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0911257 A2 19990428; EP 0911257 A3 20000223; JP 3051366 B2 20000612; JP H11124093 A 19990511; US 6164918 A 20001226
DOCDB simple family (application)
EP 98203566 A 19981022; JP 29130097 A 19971023; US 17695498 A 19981022